重点讲解：
1. engage in/participate in
参与；从事；参加；
eg. Home-based employees also get to participate in the program.
在家办公的员工也可以参与这项计划。
eg. So we have to be very cautious of you know what kind of activities we engage in.
所以我们对参加哪种集体活动都会谨慎的考虑。
2. break out
（战争、战斗或疾病）爆发；
eg. Normally, when price wars break out, weaker companies head for the exit.
正常情况下，当价格战爆发时，较弱的公司会被淘汰。
eg. Disagreement reached such a pitch that we thought a fight would break out.
意见分歧达到我们以为会争吵起来的程度。
3. take a dive
认输；(拳击中)假装被击倒；
eg. Why don't you take a dive?
你何不（接受贿赂）装败呢？
eg. Before the bout began the fighter was to take a dive. This was the first time.
拳击尚未开始，对手就故意认输了，这还是第一次。